hacky-sack

Noun

hacky sack (countable and uncountable, plural hacky sacks)

1. (uncountable) A game or activity in which one or a group of players try to keep a footbag off the ground using only their feet.
2. (countable) The footbag used for such a game.
   • At the food court, I bought a turkey sandwich and another coffee. As I ate, an entourage caught my eye: four Buddhist monks, camped at the periphery of the food court seats, about thirty feet away. Shaved heads, maroon and pumpkin-colored robes. Each was smiling, even the one who slept. You'd think...2008, Wally Lamb, The Hour I First Believed, Ch.3, at p.74